Ukusatshalaliswa kwezinga lokushisa kwangaphakathi kwe-plate fin heat exchanger ohlelweni lwe-liquefaction

Ukusatshalaliswa kwezinga lokushisa kwangaphakathi kwe-plate fin heat exchanger kusistimu yoketshezi:
1） Umjikelezo wokunwetshwa kwe-nitrogen: umehluko wezinga lokushisa lokushintshaniswa kokushisa emaphethelweni amabili kanye nezingxenye ezimaphakathi zesishintshi sokushisa mncane kakhulu, futhi umehluko wezinga lokushisa lokushintshaniswa kokushisa kwezinye izingxenye mkhulu. Kodwa-ke, kunezidingo ezithile zomehluko omncane wokushisa wokudlulisa ukushisa ekwakhiweni kwesishintshi sokushisa, okungeke kube kuncane kakhulu. Ngokuvamile, ukusabalalisa umehluko wokushisa wokushintshaniswa kokushisa akulingani, umehluko wokushisa mkhulu, futhi ukulahlekelwa okungenakuhlehliswa kukhulu, ngakho-ke isidingo samandla we-shaft we-compressor ehambisanayo sizoba sikhulu;
2） Umjikelezo wokunwetshwa kwe-nitrogen methane: umthamo wokupholisa engxenyeni enezinga lokushisa eliphansi yesishintshi sokushisa unikezwa yi-throttle valve. I-mixer ye-nitrogen ne-methane iyadonsa futhi iphole. Ngenxa yokuqukethwe okuphezulu kwe-methane, umehluko wezinga lokushisa ekugcineni okubandayo ngemva kokushaywa umoya mncane. Ngemuva kokukhuphuka kwezinga lokushisa, i-methane ne-nitrogen ziyahwamuka ngokushesha, kunikeze umthamo omkhulu wokupholisa, okuholela ekuhlukeni okukhulu kwezinga lokushisa endaweni yokushisa ukushisa kanye negesi exutshwe yi-vaporized iyaqhubeka nokukhuphuka, ukushisa okunengqondo kusetshenziselwa ukunikeza amandla okupholisa ukucindezela okuphezulu. igesi yemvelo ewuketshezi, futhi umehluko wokushisa uqala ukusebenza. Ngemva kokuncishiswa kwenani elithile, uketshezi olubandayo luxutshwa negesi enezinga lokushisa eliphansi endaweni yokukhipha isandisi ukuze kuqhutshekwe nokunikeza umthamo wokupholisa wesistimu. Umehluko omncane wokushisa ngaphakathi kwebhokisi elibandayo usekupheleni okushisa kakhulu, isiphetho esibanda kakhulu kanye nokuhlangana koketshezi oluncibilikayo noketshezi lokunwetshwa, Ngaphezu kwalokho, umehluko ojwayelekile wokushisa wokushintshanisa ukushisa nawo ungaphansi komjikelezo wokunwebeka kwe-nitrogen;
3） I-MRC: umehluko wezinga lokushisa lokushintshaniswa kokushisa ekugcineni kwezinga lokushisa eliphansi ngaphakathi kwesishintshi sokushisa mncane, futhi umehluko wezinga lokushisa mkhulu uma useduze nezinga lokushisa elivamile. Lokhu kungenxa yokuthi i-isopentane isetshenziselwa ukufaka esikhundleni se-butane esiqandisini. Ngemva kokuba isiqandisi esihlanganisiwe esicindezelwe sipholiswe ngamanzi olwandle, i-isopentane esiqandisini ihlanganiswa ibe uketshezi. Esiqandisini esixutshwe ne-throttled, i-isopentane iqala ukuhwamuka ekushiseni okuphezulu, ngokushisa okukhulu okucashile kokuhwamuka. Le ngxenye yomthamo wokupholisa ayikwazi ukudliwa lapho igesi yemvelo kanye nesiqandisi esixutshwe nokucindezela okuphezulu ekugelezeni kokushisa kupholile, Ngakho-ke, umehluko wokushisa wokushintshaniswa kokushisa kulesi sigaba mkhulu. Kodwa-ke, ukusebenzisa i-isopentane esikhundleni se-butane njenge-refrigerant ephezulu yokubilisa ayikwazi ukunciphisa ukusetshenziswa kwamandla kuphela, kodwa futhi kwandise umehluko wokushisa wokushintshaniswa kokushisa, okuzuzisa kakhulu kulo lonke uhlelo;
Ngokukhula kwenani lezigaba zomjikelezo wesiqandisi, ukusetshenziswa kwamandla kwesistimu yesiqandisi kuncipha, futhi i-coefficient yesiqandisi kanye nokusebenza kahle kwamandla, kodwa ithonya lokwanda kwenani lezigaba ekusebenzeni kwesiqandisi liyehla. Ukwenyuka kwezigaba zomjikelezo wesiqandisi kuzokwandisa inkimbinkimbi yenqubo futhi kunciphise ukusebenza. Izigaba ezifanele zezinhlelo zokuqandisa ezinezikali ezihlukene zihlukile. Uma isikali siba sikhulu, kuba nezigaba ezifanele kakhulu;

I-MRC ihlanganisa umjikelezo onokupholisa kuqala kanye nomjikelezo ngaphandle kokupholisa kuqala. Umjikelezo wokupholisa wangaphambi kokupholisa uhlanganisa nokupholisa kuqala kwesiqandisi okuhlanzekile kanye nokupholisa kuqala kwesiqandisi okuxubile. Iziqandisi ezixubile kule mijikelezo zihlukaniswe izigaba ezahlukene. I-liquid ehlukanisiwe nesiteji ngasinye i-subcooled futhi i-throttled ukuze ifakwe esiqandisini, futhi igesi ehlukanisiwe iyaqhubeka nokupholisa nokuhlukaniswa. Izigaba zokuhlukanisa zihlukile, ubunzima benqubo buhlukile, nokusebenza kahle komjikelezo wesiqandisi kuhlukile;
37, Ekwakheni kwenqubo ye-MRC, kuyadingeka ukukhulisa ukwakheka kwenqubo bese ukhetha inombolo yomjikelezo efanele. I-MRC ihlanganisa i-MRC yesiteji esisodwa, i-MRC yezigaba ezimbili, i-MRC yezigaba ezintathu kanye ne-MRC yezigaba eziningi. Le mijikelezo yesiqandisi isetshenziswa njengamanje. Izigaba ezihlukene zomjikelezo wesiqandisi, ukusetshenziswa kwamandla esiqandisini okuhlukile kanye nobunzima obuhlukahlukene benqubo kudingeka kukhethwe ngokuya ngesilinganiso esihlukile sokucubungula. Ukwenza ngcono kwe-MRC kuhlanganisa ukwenziwa ngcono kwesakhiwo kanye nokwenza kahle kwepharamitha yenqubo;